Pile wire



FEE 1936. o. J. PICKARD ET AL 2,930,763

PILE WIRE Filed June 28, 1934 Patented Feb. 11, 1936 UNITED STATESPATENT OFFICE PILE WIRE Oliver J. Pickard and Fred Pickard,Philadelphia, Pa.

Application June 28, 1934, Serial No. 782,934 1 Claim. (01. 139-44) Thisinvention relates to improvements in pile through the access Openingafiorded by h wires of the detachable cutter blade type, and a tongue 8,it slips neatly into the pocket 5 with its principal object of theinvention is to provide a inclined ends in engagement with thecorrespondwire of that character having novel means for ingly formedundercut ends of the p e 5 facilitating the insertion and detachment ofthe tongue 8 then exerts a resilient pressure against 5 cutting blade.the side of the blade holding it in position in the The inventionfurther resides in the novel pocket and preventing accidentaldisplacement. structural features hereinafter set forth and illus- Itwill be noted that the lower attenuated end tratedin the attacheddrawing, in which: of the tongue 8 is cut away at 9 to provide an 10Figure 1 is a side elevational view of the bladeopening for insertion ofa suitable pointed in- 10 receiving end of a pile wire made inaccordance strument for flexing the tongue 8 outwardly with ourinvention; when the blade 6 is to be withdrawn from the Figs. 2 and 3are detached side elevational views pocket, the normal flexibility ofthe blade perof the elements of the blade-receiving end of the mittingdisplacement of the end laterally from ir under the contiguous inclinedend of the pocket 16 Fig. 4 is a sectional view on the line 4-4, Fig; 3,so that the blade may be readily withdrawn. In and inserting the blade,the pointed smaller end of Fig. 5 is a view in perspective of theblade-rethe latter may be inserted under the end of the ceiving end ofthe wire illustrating the method of tongue, and by simple pressure slidinto the 20 inserting and withdrawing the blade. pocket until theopposite end of the blade slips 20 With reference to the drawing, thewire comunder the undercut shoulder in the filler piece 3. prises an endportion l which in the present in- In the present instance, we haveshown the stance is attached by brazing to the body portion filler piece3 provided with an auxiliary cutting 2 of the wire. The end portion I isformed in the edge III which in the event that the main blade 6 presentinstance of a filler piece 3 formed as is broken will be effective tocut the pile loop. 25 shown in Fig. 2 and a U-shaped envelope 4 Thisauxiliary blade is not essential and may be shown in Figs. 3 and 4. Inassembly, the piece 3 eliminated where desired. There may be a confitsinto the envelope 4 and is welded or othersiderable' modification of thestructure herein wise secured to the latter. The combinedthickillustrated and described without departure from nesses of thedouble wall of the envelope 4 and of theinvention as defined in theappended claim. 3

the piece 3 are substantially the same as the nor- We claim: malthickness of the body 2 of the pile wire. By A pile wire comprising asubstantially U- reason of the recessed formation of the upper shapedend portion, and a filler piece secured edge of the filler piece 3, asshown in Fig. 2, the 7 between the sides of said U-shaped end portionassembly provides a pocket 5 for reception of a and being recessed atthe top to afford a pocket 35 cutting blade 6, and this pocket as shownin for reception of a primary cutting blade, the end Fig. 1 is undercutat both ends for the purpose of of said filler piece adjoining theextremity of the retaining and of preventing accidental displacewirebeing of increased height to provide a proment of the blade 6 after thelatter has been jection at the upper edge of the wire sharpened insertedin the manner hereinafter set forth. at the inner side and constitutingan auxiliary As shown in Figs. 1, 3 and 5, one side of the cuttingblade, the ends of said pocket being unenvelope 4 is provided with asubstantially V- dercut to prevent retraction of said primary bladeshaped incision 1 providing a flap or tongue 8 from the top of thepocket, a section of one side which may be flexed outwardly as shown inFig. 5 wall of said U-shaped portion being partially sevto afford accessto the blade-receiving pocket 5. ered to provide an integral flexibletongue dis- The diagonal forward end of this tongue lies opplaceablefrom the normal plane to afford access posite the corresponding undercutend of the to said pocket for insertion and withdrawal of pocket 5,while the lower edge of the tongue lies said primary blade. at thebottom of the said pocket, so that when the OLIVER J. PICKARD.

blade 6, which is formed at its ends to neatly fit FRED PICKARD. 50

the undercut ends of the pocket, is slid into place

